package com.hjl.tools;

import java.io.IOException;
import java.io.InputStream;
import java.util.Properties;

//读取配置文件的工具类——单例模式
public class ConfigManager {

    private static ConfigManager configManager = new ConfigManager();
    private static Properties properties;

    //私有构造器——读取数据库配置文件
    private ConfigManager() {

        String configFile = "database.properties";
        properties = new Properties();
        InputStream is = ConfigManager.class.getClassLoader().getResourceAsStream(configFile);

        try {
            properties.load(is);
            is.close();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }

    //全局访问点
    public static ConfigManager getInstance() {
/*        if (configManager == null) {
            configManager = new ConfigManager();
        }*/
        return configManager;
    }

    public String getValue(String key) {
        return properties.getProperty(key);
    }
}
